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2021 Fiscal Year Annual Research Report

Study of two-dimensional Si Esaki diodes at ultra-high doping with semimetal behavior

Research Project

Project/Area Number 19K04529
Research InstitutionShizuoka University

Principal Investigator

Moraru Daniel  静岡大学, 電子工学研究所, 准教授 (60549715)

Project Period (FY) 2019-04-01 – 2022-03-31
KeywordsEsaki diode / semimetal / donor-acceptor pair / band-to-band tunneling / silicon-on-insulator
Outline of Annual Research Achievements

The research aims to reveal new properties of Si nanodevices, emerging due to the high doping with both donors and acceptors. In such systems, the interplay between donors and acceptors in small scale may lead to a behavior similar to "semimetals".
We have addressed this research by two main approaches (plans): (A) by fabrication of highly-doped nanodevices (doped both with P-donors and B-acceptors) and their electrical characterization; (B) by analyzing co-doped Si nanowire devices using first-principles and semi-empirical simulations.
We succeeded in introducing a rapid thermal annealing (RTA) system to process a more controllable doping profile in silicon-on-insulator pn and pin diodes. After the optimization of this process, the Esaki diode characteristics could be confirmed and further analysis is currently under way, based mainly on low-temperature modeling of band-to-band tunneling current features. (Preliminary results were reported in D. Moraru et al., inter-Academia 2021 Conference.)
In terms of simulations, we investigated the role of multiple B-acceptors in electron transport through a-few-donor clusters in Si nanowire transistors (Appl. Phys. Express 2021). Based on this background, we also studied pn and pin Si nanowire diodes, containing a P-donor/B-acceptor pair in different configurations. The analysis was then focused on correlating electrical characteristics, density-of-state spectra and carrier wave functions, in order to reveal the impact of the discrete dopants in band-to-band tunneling transport. (Preliminary results were reported in JSAP 69th Meeting.)

  • Research Products

    (16 results)

All 2022 2021 Other

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results) Presentation (13 results) (of which Int'l Joint Research: 9 results,  Invited: 2 results) Remarks (1 results)

  • [Journal Article] Probing ionization characteristics of under-water plasma arc discharge using simultaneous current and voltage versus time measurement in carbon nanoparticle synthesis2021

    • Author(s)
      M. Anwar, T. E. Saraswati, L. Anjarwati, D. Moraru, A. Udhiarto, F. Adriyanto, H. Maghfiroh, R. Nuryadi
    • Journal Title

      Micro and Nano Engineering

      Volume: 14 Pages: 100099_1-7

    • DOI

      10.1016/j.mne.2021.100099

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electron transport via a few-dopant cluster in the presence of counter-dopants in silicon nanowire transistors2021

    • Author(s)
      C. Pandy, G. Prabhudesai, K. Yamaguchi, V N Ramakrishnan, Y. Neo, H. Mimura, D. Moraru
    • Journal Title

      Applied Physics Express

      Volume: 14 Pages: 055002_1-6

    • DOI

      10.35848/1882-0786/abf404

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 高濃度共ドープしたSiナノトランジスタの単一電子トンネリング評価2022

    • Author(s)
      金子 義,タルナ・テジャ・ジュパリ, 三浦 舜平, 山口 謙祐, モラル・ダニエル
    • Organizer
      The 69th JSAP Spring Meeting 2022
  • [Presentation] Study of single-electron tunneling in Si nano-transistors in different doping concentration regimes for room-temperature operation2022

    • Author(s)
      T. T. Jupalli, A. Debnath, Y. Ono, and D. Moraru
    • Organizer
      The 69th JSAP Spring Meeting 2022
  • [Presentation] Theoretical analysis on the effect of coupling between dopants and leads in Si nanodiodes for band-to-band tunneling enhancement2022

    • Author(s)
      C. Pandy, K. Yamaguchi, Y. Neo, H. Mimura, and D. Moraru
    • Organizer
      The 69th JSAP Spring Meeting 2022
  • [Presentation] Inkjet printing of carbon nanotube array at low density for CMOS-compatible fabrication of nanoscale transistors2022

    • Author(s)
      R. S. Singh, K. Takagi, T. Aoki, J. Moon, Y. Neo, D. Moraru, and H. Mimura
    • Organizer
      The 69th JSAP Spring Meeting 2022
  • [Presentation] Study of single-electron tunneling transport in high-concentration co-doped SOI-FETs2022

    • Author(s)
      T. T. Jupalli, T. Kaneko, S. Miura, C. Pandy, and D. Moraru
    • Organizer
      The 8th International Symposium toward the Future of Advanced Researches in Shizuoka University (ISFAR-SU 2022 )
    • Int'l Joint Research
  • [Presentation] Study of deposition and manipulation of carbon-nanotube arrays at low density2022

    • Author(s)
      R. S. Singh, K. Takahashi, K. Takagi, T. Aoki, J. H. Moon, Y. Neo, F. Iwata, D. Moraru, and H. Mimura
    • Organizer
      The 8th International Symposium toward the Future of Advanced Researches in Shizuoka University (ISFAR-SU 2022 )
    • Int'l Joint Research
  • [Presentation] Theoretical study of the impact of a front-end dopant pair on tunneling current in Si nanodiodes2022

    • Author(s)
      C. Pandy, K. Yamaguchi, Y. Neo, H. Mimura, and D. Moraru
    • Organizer
      The 8th International Symposium toward the Future of Advanced Researches in Shizuoka University (ISFAR-SU 2022 )
    • Int'l Joint Research
  • [Presentation] Probing of deep states by band-to-band tunneling in nanoscale silicon-on-insulator Esaki diodes2021

    • Author(s)
      D. Moraru, Y. Tamura, Y. Iwatsuki, and K. Yamaguchi
    • Organizer
      The 19th International Conference on Global Research and Education in Engineering for Sustainable Future (Inter-Academia 2021)
    • Int'l Joint Research
  • [Presentation] First-principles study of bandgap electronic states under electric field in silicon nanowires with discrete dopants2021

    • Author(s)
      K. Yamaguchi, M. Tabe, and D. Moraru
    • Organizer
      The 19th International Conference on Global Research and Education in Engineering for Sustainable Future (Inter-Academia 2021)
    • Int'l Joint Research
  • [Presentation] Theoretical study of the impact of a donor-acceptor pair on tunneling current in Si nanodiodes2021

    • Author(s)
      C. Pandy, K. Yamaguchi, Y. Neo, H. Mimura, M. Tabe, and D. Moraru
    • Organizer
      The 19th International Conference on Global Research and Education in Engineering for Sustainable Future (Inter-Academia 2021)
    • Int'l Joint Research
  • [Presentation] Silicon electronics at atomic and molecular scales2021

    • Author(s)
      D. Moraru
    • Organizer
      13th International Conference on Physics of Advanced Materials (ICPAM-13)
    • Int'l Joint Research / Invited
  • [Presentation] Statistical analysis of likelihood of donor-induced quantum dots in Si nano-transistors at different concentrations2021

    • Author(s)
      T. T. Jupalli, A. Debnath, G. Prabhudesai, and D. Moraru
    • Organizer
      13th International Conference on Physics of Advanced Materials (ICPAM-13)
    • Int'l Joint Research
  • [Presentation] Measurements of single-electron tunneling through atoms in nanoscale devices2021

    • Author(s)
      D. Moraru
    • Organizer
      Physics of Advanced Materials School (PAMS-4)
    • Int'l Joint Research / Invited
  • [Remarks] Shizuoka University, Moraru Lab website

    • URL

      https://wwp.shizuoka.ac.jp/morarulab/

URL: 

Published: 2022-12-28  

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